[Bug 1751745] Stacktrace.txt

[Apport retracing service]

** Attachment added: "Stacktrace.txt"
   https://bugs.launchpad.net/bugs/1751745/+attachment/5063384/+files/Stacktrace.txt

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Title:
  groff crashed with signal 31 in kill()

Status in groff package in Ubuntu:
  New

Bug description:
  man for user under sudo is broken.

  sudo -s
  man ls

  man: can't change directory to '/home/amarao': Permission denied
  man: command exited with status 159: /usr/lib/man-db/zsoelim | /usr/lib/man-db/manconv -f UTF-8:ISO-8859-1 -t UTF-8//IGNORE | preconv -e UTF-8 | tbl | nroff -mandoc -rLL=274n -rLT=274n -Tutf8

  ProblemType: Crash
  DistroRelease: Ubuntu 18.04
  Package: groff-base 1.22.3-10
  ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
  Uname: Linux 4.15.0-10-generic x86_64
  ApportVersion: 2.20.8-0ubuntu10
  Architecture: amd64
  Date: Mon Feb 26 11:53:54 2018
  Dependencies:
   gcc-8-base 8-20180208-0ubuntu1
   libc6 2.26-0ubuntu2.1
   libgcc1 1:8-20180208-0ubuntu1
   libstdc++6 8-20180208-0ubuntu1
  DistributionChannelDescriptor:
   # This is a distribution channel descriptor
   # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
   canonical-oem-somerville-xenial-amd64-20160624-2
  ExecutablePath: /usr/bin/groff
  InstallationDate: Installed on 2017-06-22 (249 days ago)
  InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
  ProcAttrCurrent: /usr/bin/man (enforce)
  ProcCmdline: groff -mtty-char -Tutf8 -mandoc -rLL=274n -rLT=274n
  Signal: 31
  SourcePackage: groff
  StacktraceTop:
   kill () from /lib/x86_64-linux-gnu/libc.so.6
   ?? ()
   ?? ()
   ?? ()
   __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6
  Title: groff crashed with signal 31 in kill()
  UpgradeStatus: No upgrade log present (probably fresh install)
  UserGroups:

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